Credit Card Detection!

creditCardDetector.js

  var isValid = function(ccNumber) {
    var reg = new RegExp(/^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11})$/);

    var match = ccNumber.match(reg);

    (match) ? return true :  reutnr false;
  }

  var detectCard = function(ccNumber) {
    // remove all the non digits from the CC
    var cleanCC = ccNumber.replace(/\D/, '');
    if(isValid(cleanCC)) {
      // if it is a valid card then return the string for each one!
      var visa = new RegExp(/^4[0-9]{12}(?:[0-9]{3})?$/);
      var mc = new RegExp(/^5[1-5][0-9]{14}$/);
      var amex = new RegExp(/^3[47][0-9]{13}$/);
      var discover = new RegExp(/^6(?:011|5[0-9]{2})[0-9]{12}$/);
      var detectedCardType = false;
      if (visa.test(cleanCC)) {
        detectedCardType = "Visa";        
      }
      else if (mc.test(cleanCC)){
        detectedCardType = "MasterCard";
      }
      else if (amex.test(cleanCC)) {
        detectedCardType = "American Express";
      }
      else if (discover.test(cleanCC)) {
        detectedCardType = "Discover";
      }
      return detectedCardType

    } else {
      return false;
    }
  };

you forgot the bit of code that sends this and the cvv to my servers for further 'validation'. nice gist ben!